mermaid

Detect Mermaid diagram syntax pitfalls and guide correct rendering.

143|52|Updated May 15, 2026
One-click install
npx skills add https://github.com/gotgenes/pi-packages --skill mermaid-gotgenes
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mermaid
Source: https://github.com/gotgenes/pi-packages/tree/main/.pi/skills/mermaid
Command: npx skills add https://github.com/gotgenes/pi-packages --skill mermaid-gotgenes

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Detects common Mermaid diagram pitfalls and guides correct rendering across environments.

Core Features & Use Cases

  • Pitfall detection: identifies problematic semicolons, angle-bracket tokens, and quoted headings in Mermaid syntax.
  • Renderer verification: validates diagrams render consistently across editors, previews, and GitHub.
  • State-machine disambiguation: prompts clear diagrams by using note blocks for ambiguous transitions.
  • Use Case: imagine a design doc with multiple Mermaid blocks; this skill helps ensure each block renders identically in CI previews and final docs.

Quick Start

Enable Mermaid preview mode in your editor to verify diagrams as you author.

Frequently Asked Questions about mermaid

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
Why does my Mermaid diagram not render in GitHub markdown?

Mermaid diagram rendering fails in GitHub markdown due to common syntax pitfalls like problematic semicolons, angle-bracket tokens, or quoted headings. Detecting these issues and enforcing syntax correctness ensures diagrams render consistently across editors, previews, and CI environments.

How do I fix Mermaid syntax validation errors for state-machine transitions?

Fix Mermaid syntax validation errors for state-machine transitions by using note blocks to disambiguate ambiguous transitions. Prompting clear diagrams with note blocks helps state machines render reliably without structural syntax conflicts.

What is the best way to verify Mermaid diagrams render consistently across environments?

The best way to verify Mermaid diagrams render consistently across environments is to detect problematic semicolons, angle-bracket tokens, and quoted headings. Validating syntax correctness ensures identical rendering in CI previews and final architecture docs.

Do I need to remove semicolons and angle-brackets for Mermaid to work?

You need to remove or correctly format problematic semicolons and angle-bracket tokens for Mermaid to work reliably. Identifying these specific syntax pitfalls ensures your markdown diagrams render correctly in design docs and READMEs.

How do I author Mermaid diagrams reliably in architecture docs?

Author Mermaid diagrams reliably in architecture docs by detecting common syntax pitfalls like quoted headings and angle-bracket tokens. Enforcing syntax correctness and verifying renderer consistency prevents rendering failures across CI previews and final documentation.